2015年12月29日 星期二

CentOS6 解決Device eth0 does not seem to be present

一,問題描述

在VMware裡搬移出來的CentOS 無法連上網路。

ifconfig...沒有看到eth0.。然後重啟網卡又報下面錯誤。

故障現象:

service network restart
Shutting down loopback insterface: [ OK ]
Bringing up loopback insterface: [ OK ]
Bringing up interface eth0: Device eth0 does not seem to be present,delaying initialization. [FAILED]

二,解決辦法

1
首先,打開/etc/udev/rules.d/70-persistent-net.rules內容如下面例子所示:
# vi /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:8f:89:9
7", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:50:bd:1
7", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
記錄下,eth1網卡的mac地址00:0c:29:50:bd:17
接下來,打開/etc/sysconfig/network-scripts/ifcfg-eth0
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
將 DEVICE="eth0"  改成  DEVICE="eth1"  ,
將 HWADDR="00:0c:29:8f:89:97" 改成上面的mac地址  HWADDR="00:0c:29:50:bd:17"
最後,重啟網路
# service network restart
或者
# /etc/init.d/network restart
正常了。
   
2、刪除/etc/udev/rules.d/70-persistent-net.rules文件,重啟系統。

3、如果上面的不起作用
    (1), ifconfig 查看HWADDR的值
    (2), /etc/sysconfig/network-script/ifcfg-eth1中修改ifconfig中查出的HWADDR值;

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